The crossword solution for the term 'PREFIX WITH -GRAMME' is AERO. The prefix 'aero-' is derived from the Greek word 'aer' meaning air or atmosphere. It is commonly used in scientific terms to refer to air or atmospheric related phenomena, such as aerodynamics, aeronautics, and aerobatics. The suffix '-gramme' is derived from the Greek word 'GRAMMA' meaning letter or writing. When combined, the term 'aero-gramme' refers to a written message sent through the air, such as a telegram.